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Finding the Fourth Proportional to 383,310.25, 528,971.64 and 211,234.39

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Solution

The fourth proportional to 383,310.25, 528,971.64 and 211,234.39 is: 291,505.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,310.25 : 528,971.64 = 211,234.39 : x
  2. Step 2: Convert to fraction form
    383,310.25/528,971.64 = 211,234.39/x
  3. Step 3: Cross multiply
    383,310.25x = 528,971.64 × 211,234.39
  4. Step 4: Simplify right side
    383,310.25x = 111,736,998,838.69
  5. Step 5: Solve for x
    x = 111,736,998,838.69/383,310.25
  6. Step 6: Final answer
    x = 291,505.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.